Fish For Kids - Amazing Animal Books For Young Readers Table of Contents Introduction What are fish? What do fish eat? How do fish breathe? Fish and appearance Fish and each other What do fish do? Saltwater versus freshwater fish Sharks Goldfish Marlins Lungfish Mud skippers Coelacanths Conclusion Author Bio Introduction The name 'fish' is a very broad term, meaning that it refers to many different types of animals, from sharks to goldfish to lungfish. Since there are more areas covered with water than there is dry land, fish are all around the world, and quite possibly outnumber most other animals. In older times, a fish used to be anything that swam. A beaver was a fish, for instance, or a frog. Now, the definition is narrower, but still has many different creatures in it. In this book, you'll read about fish and how they work, and then you'll read about different types of fish. However, since there are thousands upon thousands of different kinds of fish, it's really only scratching the surface of different fish species. From the endangered coelacanth to the common goldfish, all fish are interesting in their own way.